98 CRV LX CYP/CMP repeat failure
This 98CRV LX fwd, had the distributor replaced 2-3 years ago. Customer is a friend and parts counter man.
Customer stated it had TPS and MAP high & low voltage codes, and was crank/no start. I went over and checked spark, was good. No injector pulse. MAP & TPS voltage PIDS, both were normal. Scoped CKP, TDC, and CMP/CYP sensors. CMP/CYP was dead and produced no signal, CKP & TDC were good.
He replaced distributor Sunday, Ran fine that day, stumbled & nearly stalled once Monday. Today is crank/no start again. I haven’t gotten a chance to check anything but I have a bad feeling that something is frying the CMP/CYP.
In 11yrs I’ve not come across a bad PCM in this era of Honda, but this could be the first. What could kill the CMP in such a short time?
Coil arcing could kill it, and since that's an internal coil it is quite likely even though it's a new distributor. General consensus nowadays is that there really are no quality parts for cars that age. Sometimes you can still buy OE from the dealer, sometimes not. Sometimes new Denso is available, sometimes not.
I've never seen a quality aftermarket distributor for Honda. Most likely the new distributor is garbage. If it were mine, I would get a used factory distributor, and replace the seal. The seals are available fro. A couple of websites, one of which, is mine.
I have had 2 similar problems with Hondas about the same vintage.One was an Accord and what I thought was eating distributors ended up to be the PCM.Tapping on the PCM and it would start right up.Opened the PCM,nothing but corrosion.The car had a leaky winshield and somehow soaked the PCM.The other was a…
The leaking windshield sounds particularly interesting. I am certain that the windshield has been replaced in this vehicle. The PCM is in the right kick panel if memory serves.
I recall some of those vintage of Honda's even had the PCM located under the right side floor carpeting. Not ideal for snowy areas and melting snow from boots. I also remember one customer who thought that puddle in the road couldn't be that deep, right? Well, no signal to the distributor led to the no-start complaint. No wonder, as we could shake water out of the PCM!
Had a similar issue once. Only died during car washes. Upon inspection found the cam sensor was not fully seated/ bolted down. There was also a intermittent hesitation and the rpm gauge would jump up. Did have a cheap eBay distributor. I rebuilt the distributor with OEM parts. No issue since.
I personally have experienced multiple replacement distributor failures on Honda's. You cannot find a quality unit anymore. I would look into rebuilding one yourself, like recommended by someone else. If the replacement dist. doesn't fail, it'll surely turn the SES light on with a CMP code, never fails. They are garbage!!